The Black Sabbath singer was pictured kissing his wife at the function, which was hosted by Clive Davis at the Beverly Hilton Hotel in Los Angeles ahead of Sunday's awards ceremony.
The 71-year-old supported himself with a dark, glitzy cane as he walked the red carpet in his signature all-black and round tinted glasses, with Sharon, 67, matching in an all-black top and trouser combo too.
They were also joined by their youngest daughter Kelly who like her parents sported all black in a velvet dress but stood out with her bobbed purple hair.
Ozzy spoke publicly about his diagnosis for the first time earlier this week as he and Sharon made an emotional appearance in an interview with Good Morning America.
"It's Parkin 2," Sharon stated. "There's so many different types of Parkinson's; it's not a death sentence by any stretch of the imagination, but it does affect certain nerves in your body. And it's -- it's like you have a good day, a good day, and then a really bad day."
It comes as the rocker experienced a fall in his home last February which left him requiring surgery.
The couple have said that it has been a struggle for doctors to differentiate between which of Ozzy's symptoms have come as a result of surgery and which are from his Parkinson's diagnosis as a result.
Jack Osbourne, who has been diagnosed with multiple sclerosis, shared a public message of support regarding his father in the wake of the news.
Posting a picture of himself as a toddler alongside Ozzy, he wrote: "He’s the strongest man I know and what he has been facing will only make him and stronger/better man."